On 2020-05-02 9:27 AM (-4), Bald Eagle wrote:
> Hopefully this is to spec.
> 
> The green circles are torus{} objects to show that the cross section is indeed
> exactly circular.
> 
> Not my best work, and it's only a parametric, not an implicit equation, but
> perhaps  I can "implicitize" it.

This is a test of an equation posted by Sebastian H in 2006.  The shape 
appears to be exact, but the max_gradient is a nightmare, and I don't 
know how it stable the gradients are.  The post is at:
   https://news.povray.org/4409cd2a%40news.povray.org

Post a reply to this message

Attachments:
Download 'sebastian-elliptor-test4.jpg' (59 KB) Download 'sebastian-elliptor-test70-4.jpg' (48 KB)

Preview of image 'sebastian-elliptor-test4.jpg'

Preview of image 'sebastian-elliptor-test70-4.jpg'